All Outputs (36)

Investigation of the stability of Co-doped apatite ionic conductors in NH3 (2010)
Journal Article
Headspith, D. A., Orera, A., Slater, P. R., Young, N. A., & Francesconi, M. G. (2010). Investigation of the stability of Co-doped apatite ionic conductors in NH3. Journal of Solid State Chemistry, 183(12), 2746-2758. https://doi.org/10.1016/j.jssc.2010.08.033

Hydrogen powered solid oxide fuel cells (SOFCs) are of enormous interest as devices for the efficient and clean production of electrical energy. However, a number of problems linked to hydrogen production, storage and transportation are slowing down... Read More about Investigation of the stability of Co-doped apatite ionic conductors in NH3.

Formation of apatite oxynitrides by the reaction between apatite-type oxide ion conductors, La8+xSr2-x(Si/Ge)6O26+x/2, and ammonia (2009)
Journal Article
Orera, A., Headspith, D., Apperley, D. C., Francesconi, M. G., & Slater, P. R. (2009). Formation of apatite oxynitrides by the reaction between apatite-type oxide ion conductors, La8+xSr2-x(Si/Ge)6O26+x/2, and ammonia. Journal of Solid State Chemistry, 182(12), 3294-3298. https://doi.org/10.1016/j.jssc.2009.09.029

Following growing interest in the use of ammonia as a fuel in solid oxide fuel cells (SOFCs), we have investigated the possible reaction between the apatite silicate/germanate electrolytes, La8+xSr2−x(Si/Ge)6O26+x/2, and NH3 gas. We examine how the c... Read More about Formation of apatite oxynitrides by the reaction between apatite-type oxide ion conductors, La8+xSr2-x(Si/Ge)6O26+x/2, and ammonia.

Synthesis and characterisation of the quaternary nitride-fluoride Ce2MnN3F2-δ (2009)
Journal Article
Headspith, D. A., Sullivan, E., Greaves, C., & Francesconi, M. G. (2009). Synthesis and characterisation of the quaternary nitride-fluoride Ce2MnN3F2-δ. Dalton Transactions : an international journal of inorganic chemistry, 9273-9279. https://doi.org/10.1039/b908591b

Ce 2 MnN 3 F 2-δ has been synthesised via low-temperature fluorination of the ternary nitride Ce 2 MnN 3 . To the best of our knowledge, Ce 2 MnN 3 F 2-δ is the first quaternary nitride-fluoride to be reported. The reaction of Ce 2 MnN 3 with 10% F 2... Read More about Synthesis and characterisation of the quaternary nitride-fluoride Ce2MnN3F2-δ.

Transition metal pnictide-halides: A class of under-explored compounds (2009)
Journal Article
Headspith, D. A., & Francesconi, M. G. (2009). Transition metal pnictide-halides: A class of under-explored compounds. Topics in catalysis, 52(11), 1611-1627. https://doi.org/10.1007/s11244-009-9282-5

In terms of application, mixed anion compounds have attracted far less attention than mixed cation systems. Interest in the catalytic properties of nitrides has been driven, in part, by their accessibility through new, improved synthesis routes. Alth... Read More about Transition metal pnictide-halides: A class of under-explored compounds.

Increase in magnetoresistivity in Ba2CoS3 via Zn2+/Co2+substitution (2009)
Journal Article
Harrison, M. R., Hardy, V., Maignan, A., & Francesconi, M. G. (2009). Increase in magnetoresistivity in Ba2CoS3 via Zn2+/Co2+substitution. Chemical communications : Chem comm / the Royal Society of Chemistry, 2214-2216. https://doi.org/10.1039/b817363j

We report an increase of negative magnetoresistivity from 1.7% to 9% in the Ba2Co0.5Zn0.5S3 series (0 <= x <= 0.5), derived from Zn2+/Co2+ substitution in Ba2CoS3; Zn2+ substitution destroys the one-dimensional antiferromagnetic ordering typical of B...

An investigation of the high temperature reaction between the apatite oxide ion conductor La9.33Si6O26 and NH3 (2009)
Journal Article
Kendrick, E., Headspith, D., Orera, A., Apperley, D. C., Smith, R. I., Francesconi, M. G., & Slater, P. R. (2009). An investigation of the high temperature reaction between the apatite oxide ion conductor La9.33Si6O26 and NH3. Journal of Materials Chemistry, 19(6), 749-754. https://doi.org/10.1039/b808215d

There is growing interest in the use of ammonia as a fuel in Solid Oxide Fuel Cells (SOFCs). However, the possible reaction between the electrolyte and ammonia, and its potential effect on performance, has received little attention. In this paper, we... Read More about An investigation of the high temperature reaction between the apatite oxide ion conductor La9.33Si6O26 and NH3.

Stereostructural behaviour of N-N atropisomers: Two conglomerate crystallisations and a crystallisation-induced deracemisation (2008)
Journal Article
Arthur, R. J., Coogan, M. P., Casadesus, M., Haigh, R., Headspith, D. A., Francesconi, M. G., & Laye, R. H. (2009). Stereostructural behaviour of N-N atropisomers: Two conglomerate crystallisations and a crystallisation-induced deracemisation. CrystEngComm RSC, 11(4), 610-619. https://doi.org/10.1039/b814424a

The solid state behaviour of a number of compounds which show hindered rotation around an N-N bond, in some cases leading to axial chirality is described. A diacyl hydrazine, bisanthranoly hydrazine, 1 crystallises in the chiral space group P2(1)2(1)... Read More about Stereostructural behaviour of N-N atropisomers: Two conglomerate crystallisations and a crystallisation-induced deracemisation.

Crystal and magnetic structures of (La0.70Ca0.30)(CryMn1-y)O-3: A neutron powder diffraction study (2008)
Journal Article
Capogna, L., Martinelli, A., Francesconi, M. G., Radaelli, P. G., Carvajal, J. R., Cabeza, O., Ferretti, M., Castellano, C., Corridoni, T., & Pompeo, N. (2008). Crystal and magnetic structures of (La0.70Ca0.30)(CryMn1-y)O-3: A neutron powder diffraction study. Physical review B: Condensed matter and materials physics, 77(10), 0 - 0. https://doi.org/10.1103/PhysRevB.77.104438

The crystal and magnetic structures of (La0.70Ca0.30)(CryMn1−y)O3 for y=0.70, 0.50, and 0.15 have been investigated using neutron powder diffraction. The three samples crystallize in the Pnma space group at both 290 and 5K and exhibit different magne... Read More about Crystal and magnetic structures of (La0.70Ca0.30)(CryMn1-y)O-3: A neutron powder diffraction study.

A synchrotron study of Ba5Ta2Cl2O9 (2007)
Journal Article
Barnes, A. D. J., Francesconi, M. G., & Prior, T. J. (2007). A synchrotron study of Ba5Ta2Cl2O9. Acta Crystallographica Section E: Crystallographic Communications, 63(5), I127 - I128. https://doi.org/10.1107/S1600536807016790

The structure of pentabarium ditantalum dichloride nonaoxide, Ba5Ta2Cl2O9, is isotypic with Ba5Ru1.6W0.4Cl2O9 and with one polymorph of Ba5Ru2Cl2O9. It is related to the perovskite structure and shows a ten-layer stacking of BaO3 and BaCl blocks alon... Read More about A synchrotron study of Ba5Ta2Cl2O9.

Long-range magnetic ordering in Ba2CoS3: A neutron diffraction study (2007)
Journal Article
Headspith, D. A., Battle, P. D., & Francesconi, M. G. (2007). Long-range magnetic ordering in Ba2CoS3: A neutron diffraction study. Journal of Solid State Chemistry, 180(10), 2859-2863. https://doi.org/10.1016/j.jssc.2007.07.029

Neutron powder diffraction has been used to determine the magnetic structure of the quasi-one-dimensional compound Ba2CoS3, which contains linear [001] chains of vertex-sharing CoS4 tetrahedra, spaced apart by Ba2+ cations. At 1.5 K the Co2+ cations... Read More about Long-range magnetic ordering in Ba2CoS3: A neutron diffraction study.

Synthesis and low temperature fluorination of the alkaline-earth palladates Ba2-xSrxPdO3 (x = 0-2) (2007)
Journal Article
Baikie, T., Young, N. A., & Francesconi, M. G. (2007). Synthesis and low temperature fluorination of the alkaline-earth palladates Ba2-xSrxPdO3 (x = 0-2). Progress in Solid State Chemistry, 35(2-4 SPEC. ISS.), 265-279. https://doi.org/10.1016/j.progsolidstchem.2007.01.010

Since the discovery of superconductivity in Sr2CuO2F2+δ there has been an increased interest in ternary oxide-fluorides. Sr2CuO2F2+δ is prepared via low temperature (T = 220 °C) reaction routes. Low temperature fluorination induces an interesting str... Read More about Synthesis and low temperature fluorination of the alkaline-earth palladates Ba2-xSrxPdO3 (x = 0-2).

Preparation of mesoporous Pd/Si3N4nanocomposites as heterogeneous catalysts via three different chemical routes (2006)
Journal Article
Cheng, F., Kelly, S. M., Young, N. A., Hope, C. N., Beverley, K., Francesconi, M. G., Clark, S., Bradley, J. S., & Lefebvre, F. (2006). Preparation of mesoporous Pd/Si3N4nanocomposites as heterogeneous catalysts via three different chemical routes. Chemistry of materials : a publication of the American Chemical Society, 18(25), 5996-6005. https://doi.org/10.1021/cm061106h

Mesoporous palladium/silicon nitride nanocomposites were prepared via three different chemical routes to generate simultaneous control of the solid-state morphology of the palladium nanoparticles and that of the silicon nitride support at the same ti... Read More about Preparation of mesoporous Pd/Si3N4nanocomposites as heterogeneous catalysts via three different chemical routes.

DSC study of sucrose melting (2006)
Journal Article
Beckett, S. T., Francesconi, M. G., Geary, P. M., Mackenzie, G., & Maulny, A. P. (2006). DSC study of sucrose melting. Carbohydrate Research, 341(15), 2591-2599. https://doi.org/10.1016/j.carres.2006.07.004

An early endothermic peak at ∼150 °C was observed for crystalline sucrose by differential scanning calorimetry. The enthalpy at this temperature was found to vary with recrystallised sucrose from different sources. The addition of mineral salts to re... Read More about DSC study of sucrose melting.

Magnetic coupling and long-range order in the spin-chain sulfide Ba 2CoS3 (2006)
Journal Article
Barnes, A. D., Baikie, T., Hardy, V., Lepetit, M. B., Maignan, A., Young, N. A., & Francesconi, M. G. (2006). Magnetic coupling and long-range order in the spin-chain sulfide Ba 2CoS3. Journal of Materials Chemistry, 16(34), 3489-3502. https://doi.org/10.1039/b605178b

In this paper, we report on the magnetic properties of Ba 2CoS3, a spin-chain compound recently found to be the first Co2+-containing one-dimensional sulfide to show metallic-like conductivity and negative magnetoresistance. We carried out an in-dept... Read More about Magnetic coupling and long-range order in the spin-chain sulfide Ba 2CoS3.

General method of preparation of mesoporous M/Si3N4 nano-composites via a non-aqueous sol-gel route (2005)
Journal Article
Cheng, F., Kelly, S. M., Young, N. A., Clark, S., Francesconi, M. G., Lefebvre, F., & Bradley, J. S. (2005). General method of preparation of mesoporous M/Si3N4 nano-composites via a non-aqueous sol-gel route. Chemical communications : Chem comm / the Royal Society of Chemistry, 5662-5664. https://doi.org/10.1039/b511790a

We report a general method for the preparation of transition-metal silicon nitride nanocomposites; for example, mesoporous Pd-Si 3 N 4 nanocomposite materials with high surface area were prepared by pyrolysis of a silicon palladium imide-chloride co... Read More about General method of preparation of mesoporous M/Si3N4 nano-composites via a non-aqueous sol-gel route.

Ba2−xSrxPdO2F2(0 ≤ x ≤ 1.5): The first palladium-oxide-fluorides (2003)
Journal Article
Baikie, T., Dixon, E. L., Young, N. A., Rooms, J. F., & Francesconi, M. G. (2003). Ba2−xSrxPdO2F2(0 ≤ x ≤ 1.5): The first palladium-oxide-fluorides. Chemical communications : Chem comm / the Royal Society of Chemistry, 3(13), 1580-1581. https://doi.org/10.1039/b303402j

The first series of alkaline-earth palladium oxide-fluorides Ba2−xSrxPdO2F2(0 ≤ x ≤ 1.5) display the T′ structure (Nd2CuO4) instead of the predicted T structure (La2CuO4), showing that electronic factors prevail over steric factors.